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Patient-specific Finite Element Analysis of Fiber Post and Ferrule Design.

Abstract：

INTRODUCTION:A ferrule on anterior endodontic-treated teeth has been evaluated using clinical trials, in vitro tests, and finite element analysis (FEA). The patient-specific FEA with a nonuniform ferrule and nonlinear contact biting load associated with clinical validation can be used to predict failure. METHODS:A patient was selected with both maxillary central incisors with different ferrule designs who received endodontic treatment and restoration using a fiber post, composite core, and computer aided design and computer aided manufacturing lithium disilicate ceramic crowns. Strain gauges were attached to the buccal surfaces of both teeth to record ceramic strain during bite force recording for FEA validation. Cone-beam computed tomographic imaging was performed, and the Digital Imaging and Communication in Medicine files were exported to Mimics, 3-Matic (Materialise, Leuven, Belgium) and Patran (MSC Software, Santa Ana, CA) software to create a patient-specific FEA model. Bite load was applied using contact load applied by antagonist teeth (155 N). Mechanical properties were obtained from the literature. Modified von Mises equivalent stress was used for stress evaluation. RESULTS:Stresses on the dentin and fiber post on the left incisor, which had a nonuniform ferrule, were higher compared with the right incisor. The strain values recorded for the right central incisor (strain gauge =79.9 ± 3.8 μS and FEA = 69.5 μS) and the left central incisor (strain gauge = 83.5 ± 5.3 μS and FEA = 73.9 μS) validate the FEA analysis. CONCLUSIONS:FEA was validated with in vivo strain values measured at the buccal crown surfaces, supporting that the stress levels were realistic for investigation of the clinical performance of fiber posts. Maintaining a uniform ferrule was more favorable than a localized higher ferrule.

journal_name

J Endod

journal_title

Journal of endodontics

authors

Rodrigues MP,Soares PBF,Valdivia ADCM,Pessoa RS,Veríssimo C,Versluis A,Soares CJ

doi

10.1016/j.joen.2017.04.024

subject

Has Abstract

pub_date

2017-09-01 00:00:00

pages

1539-1544

issue

eissn

0099-2399

issn

1878-3554

pii

S0099-2399(17)30530-7

journal_volume

pub_type

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Patient-specific Finite Element Analysis of Fiber Post and Ferrule Design.